On Wed, Aug 16, 2006 at 05:24:26PM -0500, Paul Fulghum wrote:> Does the MIDI device using the standard N_TTY line discipline?> Are you using the low_latency flag on the serial device?> What type of UART has been tested (16550? other?)> Are you seeing overruns or just lost data?

MIDI uses its own driver - sound/drivers/serial-u16550.c. My guessis there's something in the system starving interrupt servicing.Serial is very sensitive to that, and increases in other systemlatencies tends to have an adverse impact on serial.